I'm going to richen up my mixture as the temps come up. I have some ATF to pick up at my buddy's tranny shop, I'm going to try 20% ATF in my WMO blend to act as a cleaning agent. So far so good, no issues or smoke. Diesel is $1.40/Liter here right now.
...Time to find a furnace oil supply system or some no-tax offroad/marine fuel.